Geoege eastman



(No Model.)

G. EASTMAN.

PHOTOGBAPHIG PLATE HOLDER. No. 388,271. Patented Aug. 21, 1888.

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N. PETERS. Phowume m hen Washingkm. 92 c- UNITED STATES PATENT rrica.

GEORGE EASTMAN, OF ROCHESTER, NEXV YORK, ASSIGNOR TO THE EAST- MAN DRY PLATE AND FILM COMPANY, OF SAME PLACE.

PHOTOGRAPHlO-PLATE HOLDER.

SPECIFICATION forming part of Letters Patent No. 388,271, dated August 21, 1888.

. Application filed October], 1887. Serial No. 251,218. (No model.)

To aZZ whom it may concern: same plane as the inner edge of the wall of the Be it known that I, GEORGE EASTMAN, of groove on the corresponding side of the oppo- Rochester, in the county of Monroe and State site bar, b. The preferred mode of securing of New York, have invented certain new and and applying these dogs in the bar I) is by 55 useful Improvements in Photographic-Plate dividing said bar into two sections, gg, the Holders; and I do hereby declare the followsection 9 carrying the flange 6, having grooves ing to be a full, clear, and exact description of or recesses out in the upper face for the rethe same, reference being had to the accomception of the dogs, which latter are held in panying drawings,forming apart of this speciposition by pins or screws 9 A groove or 60 1o flcation, and to the figures and letters of refer- Way, 9, is also formed in said face of section ence marked thereon. g for the reception and accommodation of a This invention relates to a new and imconnecting-bar, 9 which latter is pivoted to proved plate holder or receptacle for transand connects the dogsf, and is provided with porting and exposing photographic dry-plates; a lip or thumb-piece, f by which it is shifted. 65 and it consists in the novel combination, ar- The outer section, 9, of bar I) is a plain piece rangenient, and construction of parts, hereinor strip securely fastened to the lower section, after described, and pointed out in the claims. 9, and covering the recesses in the latter. As In the accompanying drawings, Figure l is is obvious, the grooves and recesses referred a front view of the holder. Figs. 2 and 3 are to may be made in the face of the section or 70 2o sectional views on the line so a: and y y, rein a strip interposed between the two sections spectively, of Fig. 1. Fig. 4 is a front view 9 g,- or the bar may be made in one piece and of one of the side bars with the outer section the recesses and grooves cut therein.

removed to disclose the locking device. In the side and end bars are formed or cut Similar letters of reference in the several grooves h h for the slides or covers S S, the 75 figures indicate the same parts. grooves h for one slide being formed in the Theletter A designates a rectangular frame, wall of groove (1 on one side and the flange of wood or other material, composed of four 6 on the other, while the grooves h for the bars or pieces, which, for convenience, may other side are formed in the opposite wall of be termed end bars, a a, and "side bars, groove (1 and in the face of barb above the 80 b b. The two opposite bars, I) b, are formed upper face of the dogs f. One of the end bars, or provided with suitable devices or nieans a, is slotted for the passage of the slide, while such as grooves c-by which they are adapted the inner face of the opposite bar a is grooved to be fitted and detachably secured in position to receive the ends of the slides. on a camera, the particular means of attach The holder described is designed especially 8 5 lnent being modified, altered, or changed at for the reception of two plates, which latter pleasure to adapt the holder to the particular are inserted and held as follows: The slide S style of camera. on the side nearest the dogs f having been In the inner face of the bar I) is formedalongiwithdrawn and the dogsfretracted within the tudinal groove or way,d,whilethe opposite bar, recesses, as by pressing the connecting-bar g 90 0 b, is provided with a single flange or shoultoward one of the end pieces a, one edge of a der, E, at or near one edge and parallel with plate, P, is inserted in the groove (Z and the the wall of the groove d on the corresponding opposite edge brought down until it rests upon edge of the opposite bar. The inner faces of the flange 6. An elastic pad, P"such, for the barsor endpieces,c,are preferably straight, example, as a sheet of stiff paper formed or 5 although they may, if desired, be provided at provided with a series of bends or corrugaone or more points with rests, or formed with tions-is now placed upon the plate, and a asingle flange, as is obvious. second plate, P, brought into position by in- In the side of the bar I) are located dogs f, serting one edge into the groove (Z and press preferably two or more, pivotally secured in ing the plate down upon the elastic pad until r00 slots formed in said bar, and so located and its opposite edge has passed below the under arranged that their inner faces will be in the face of the dogs, when by applying pressure to the connecting-bar g the dogs are projected and their ends caused to overlap the plate P. The elastic pad which is interposed between the plates serves to hold them apart and pressed against the walls of groove (1 on the one edge and the flange e and dogs f on the other. As is obvious, the two plates with the pad interposed may be simultaneously inserted in the holder, and when it is only desired to employ a single plate the side of the frame opposite that in which the dogs are located may be closed by a plate or backing of any suitable material; or, if the exposure is to be made on that side, a removable plate of wood, glass, or hard rubber may be used in lieu of theplate P.

Among the other advantages possessed by this holder may be mentioned its rigidity, simplicity, and convenience ofmanipulatiou. The plates can be quickly inserted and removed without touching them except at the edges, whereit can do no harm. There is no danger or liability of injuring the plates in sliding them into position, as they are simply dropped or laid down after one edge has been inserted in the groove on one side. The elastic pad holds the plate securely in position against the retaining-flanges, thereby protecting the edges andpreventing the plates from shifting. The dogs serve to retain the plates in place within the frame, and, being operated from a common bar, can be quickly and simultaneously withdrawn or projected to release or engage the edge of the upper plate, and the covers or exposing-slides, being received in the retainingflanges, effectually preventing the ad mission of light when closed over the plates.

Having thus described my invention, what I claim as new is 1. In a plate-holder such as described, and in combination with its grooved and flanged side bars, movable dogs or clamps supported upon the flanged side bar and devices connecting said dogs for simultaneously projeeting them over the edge of the plate or withdrawing them at will, substantially as described.

2. A plate-holder such as described, consisting, essentially, of an open frame composed of end and side pieces grooved near opposite faces for the accommodation of slides or shutters, one of said side bars being provided with a longitudinal groove intermediate the two shutters, and the other with a flange and cooperating plate-holding dogs, substantially as described.

3. The combination, in a plate-holder such as described, and with the side bars, the one grooved and the other provided with a shoulderor flange and locking-dogs, of the plates and interposed elastic cushion or pad, the whole resting at one edge in the groove of one side bar and at the opposite edge between the flange and dogs on the other side bar, substantially as and for the purpose set forth.

4. In a plate-holder such as described, the combination, with the recessed side bar, of the pivoted dogs and connecting-bar and the covering strip or plate, substantially as described.

5. In a plate-holder such as described, the combination, with the recessed side bar provided with a shoulder or flange to receive the edge of the plate, of the dog's pivotally supported in the recesses, the connecting-bar with thumb-piece or handle, and the top or outer section applied to the side bar to cover the dogs and form a groove or way for the exposing-slide, substantially as described.

G E0. E ASTMAN.

\Vitnesses:

FRANK A. BRowNELL, Z. L. DAVIS. 

